A biconvex lens of focal length 15cm is in front of a plane mirror.The distance between lens and the mirror is 10cm. A small object is kept at a distance of 30cm from the lens. The final image is:
virtual and at a distance of 20cm from the mirror
real and at a distance of 20cm from the mirror
virtual and at a distance of 16cm from the mirror
real and at a distance of 16cm from the mirror
A
real and at a distance of 16cm from the mirror
B
virtual and at a distance of 16cm from the mirror
C
real and at a distance of 20cm from the mirror
D
virtual and at a distance of 20cm from the mirror
Open in App
Solution
Verified by Toppr
The correct option is B real and at a distance of 16cm from the mirror 1f=1v−1u115=1v−1−30v=+30115=1v−110⇒115+110=1vv=15025=+6cm
The final image ˆI3 is 6cm (real) from
the lens.
10+6=16cm
from the mirror ( real)
So option B is correct.
Was this answer helpful?
0
Similar Questions
Q1
A biconvex lens of focal length 15cm is in front of a plane mirror.The distance between lens and the mirror is 10cm. A small object is kept at a distance of 30cm from the lens. The final image is:
View Solution
Q2
A point object O is placed at a distance of 20cm from a convex lens of focal length 10cm as shown in fig. At what distance x from the lens should a concave mirror of focal length 60cm, be placed so that the final image coincides with the object?
View Solution
Q3
In an experiment a convex lens of focal length 15cm is placed coaxially on an optical bench in front of a convex mirror at a distance of 5cm from it. It is found that an object and its image coincide, if the object is placed at a distance of 20cm from the lens. The focal length of the convex mirror is:
View Solution
Q4
An object is placed at 30 cm in front of the convex lens of focal length 10 cm. Find out the image distance from lens?
View Solution
Q5
An upright object is placed at a distance of 40cm in front of a convergent lens of focal length 20cm. A convergent mirror of focal length 10cm is placed at a distance of 60cm on the other side of the lens. The position and size of the final image will be